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Influence of calcination treatment on the activity of tungstated zirconia catalysts towards esterification

Paper ID Volume ID Publish Year Pages File Format Full-Text
51537 46846 2009 6 PDF Available
Title
Influence of calcination treatment on the activity of tungstated zirconia catalysts towards esterification
Abstract

In the present study, zirconia prepared by the solvothermal method was calcined under reductive (H2) and oxidative (O2) treatment to obtain ZrO2-H2 and ZrO2-O2, respectively. Then, they were impregnated with 15 wt% of tungsten (W) to produce W/ZrO2-H2 and W/ZrO2-O2 catalysts for esterification. It revealed that the presence of F-center was more dominant under the reductive treatment during calcinations of zirconia. Consequently, this can result in increased dispersion of tungsten indicating the existence of the surface monotungstates on the W/ZrO2-H2 catalyst. Therefore, the enhanced activity obtained from the W/ZrO2-H2 catalyst can be attributed to increased dispersion of tungsten and acidity.

Keywords
Surface acidity; Surface defect; Calcination atmosphere; Tungstated zirconia; Esterification
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Influence of calcination treatment on the activity of tungstated zirconia catalysts towards esterification
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 7, 10 March 2009, Pages 1079–1084
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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